are either of these books his? is correct or not

yes its  a correct statement

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Please give me any reference or proof that it is correct
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Why did zitkala resist
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the statement is itself conveying the meaning and is grammatically correct too. if not u can use Grammarly app to check the sentences
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For no of emitted lines the formula given as, n(n-1) where n is no of enegy level
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Yes it is correct
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What are you looking for?